import org.lwjgl.openal.ALC11; //导入依赖的package包/类
private void printALCInfo() {
	IntBuffer version = BufferUtils.createIntBuffer(2);
	ALCdevice device;

	if(ALC10.alcIsExtensionPresent(null, "ALC_ENUMERATION_EXT")) {
        if(ALC10.alcIsExtensionPresent(null, "ALC_ENUMERATE_ALL_EXT")) {
            printDevices(ALC11.ALC_ALL_DEVICES_SPECIFIER, "playback");
        } else {
            printDevices(ALC10.ALC_DEVICE_SPECIFIER, "playback");
        }
        printDevices(ALC11.ALC_CAPTURE_DEVICE_SPECIFIER, "capture");
    } else {
      System.out.println("No device enumeration available");
	}

	device = ALC10.alcGetContextsDevice(ALC10.alcGetCurrentContext());
	checkForErrors();

    System.out.println("Default playback device: " + ALC10.alcGetString(device, ALC10.ALC_DEFAULT_DEVICE_SPECIFIER));

    System.out.println("Default capture device: " + ALC10.alcGetString(device, ALC11.ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER));

   	ALC10.alcGetInteger(AL.getDevice(), ALC10.ALC_MAJOR_VERSION, version);
   	ALC10.alcGetInteger(AL.getDevice(), ALC10.ALC_MINOR_VERSION, (IntBuffer) version.position(1));
    checkForErrors();

    System.out.println("ALC version: " + version.get(0) + "." + version.get(1));

    System.out.println("ALC extensions:");
    String[] extensions = ALC10.alcGetString(device, ALC10.ALC_EXTENSIONS).split(" ");
	for ( String extension : extensions ) {
		if ( extension.trim().length() == 0 ) {
			continue;
		}
		System.out.println("    " + extension);
	}
    checkForErrors();
}
 

import org.lwjgl.openal.ALC11; //导入依赖的package包/类
/**
 * Runs the actual test, using supplied arguments
 */
protected void execute(String[] args) {
	int lastError = ALC10.ALC_NO_ERROR;
	IntBuffer sampleCount = BufferUtils.createIntBuffer(1);
	
	int state = AL10.AL_PLAYING;
	int FMT = AL10.AL_FORMAT_MONO16;
	int FMTSIZE  = 16/8;
	int FREQ = 44100;
	int TIME = 5;
	int SAMPS = (FREQ * TIME);
	ByteBuffer buf = BufferUtils.createByteBuffer(SAMPS * FMTSIZE);		

	// check that capture is available
	if(!ALC10.alcIsExtensionPresent(AL.getDevice(), "ALC_EXT_CAPTURE")) {
		throw new OpenALException("ALC_EXT_CAPTURE extension not available");
	}
	
	// get list of devices
	String[] captureDevices = ALC10.alcGetString(null, ALC11.ALC_CAPTURE_DEVICE_SPECIFIER).split("\0");
	System.out.println("Available Capture Devices: ");
	for(int i=0; i<captureDevices.length; i++) {
		System.out.println(i + ": " + captureDevices[i]);
	}
	
	String defaultRecorder = ALC10.alcGetString(AL.getDevice(), ALC11.ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER);
	System.out.println("Default capture device: " + defaultRecorder);
	
	ALCdevice device = ALC11.alcCaptureOpenDevice(null, FREQ, FMT, SAMPS);

	if(device != null) {
		// record some sound
		// =====================================
		System.out.print("Recording using " + ALC10.alcGetString(device, ALC11.ALC_CAPTURE_DEVICE_SPECIFIER) + "...");
		ALC11.alcCaptureStart(device);
		while (sampleCount.get(0) < SAMPS) {
			pause(1000);
			ALC10.alcGetInteger(device, ALC11.ALC_CAPTURE_SAMPLES, sampleCount);
		}
		System.out.println("done");
		ALC11.alcCaptureStop(device);

		// capure the samples
		ALC11.alcCaptureSamples(device, buf, SAMPS);
		ALC11.alcCaptureCloseDevice(device);
		// -------------------------------------
		
		// play back recording
		// ===================
        IntBuffer buffers = BufferUtils.createIntBuffer(1);
        IntBuffer sources = BufferUtils.createIntBuffer(1);        
        
        buffers.position(0).limit(1);
        AL10.alGenBuffers(buffers);

        sources.position(0).limit(1);
        AL10.alGenSources(sources);

        System.out.print("Playing...");

	    AL10.alBufferData(buffers.get(0), FMT, buf, FREQ);
	    AL10.alSourcei(sources.get(0), AL10.AL_BUFFER, buffers.get(0));
	    AL10.alSourcei(sources.get(0), AL10.AL_LOOPING, AL10.AL_FALSE);
	    AL10.alSourcePlay(sources.get(0));

	    while (state == AL10.AL_PLAYING)
	    {
	        pause(100);
	        state = AL10.alGetSourcei(sources.get(0), AL10.AL_SOURCE_STATE);
	    }

	    System.out.println("done");

	    AL10.alDeleteSources(sources);
	    AL10.alDeleteBuffers(buffers);
	}		

	alExit();
}
 

import org.lwjgl.openal.ALC11; //导入依赖的package包/类
@SubscribeEvent(priority = EventPriority.LOWEST)
public static void configureSound(@Nonnull final SoundSetupEvent event) {
	int totalChannels = -1;

	try {

		final boolean create = !AL.isCreated();
		if (create) {
			AL.create();
			alErrorCheck();
		}

		final IntBuffer ib = BufferUtils.createIntBuffer(1);
		ALC10.alcGetInteger(AL.getDevice(), ALC11.ALC_MONO_SOURCES, ib);
		alErrorCheck();
		totalChannels = ib.get(0);

		if (create)
			AL.destroy();

	} catch (final Throwable e) {
		e.printStackTrace();
	}

	int normalChannelCount = ModOptions.normalSoundChannelCount;
	int streamChannelCount = ModOptions.streamingSoundChannelCount;

	if (ModOptions.autoConfigureChannels && totalChannels > 64) {
		totalChannels = ((totalChannels + 1) * 3) / 4;
		streamChannelCount = Math.min(totalChannels / 5, MAX_STREAM_CHANNELS);
		normalChannelCount = totalChannels - streamChannelCount;
	}

	DSurround.log().info("Sound channels: %d normal, %d streaming (total avail: %s)", normalChannelCount,
			streamChannelCount, totalChannels == -1 ? "UNKNOWN" : Integer.toString(totalChannels));
	SoundSystemConfig.setNumberNormalChannels(normalChannelCount);
	SoundSystemConfig.setNumberStreamingChannels(streamChannelCount);

	// Setup sound buffering
	if (ModOptions.streamBufferCount != 0)
		SoundSystemConfig.setNumberStreamingBuffers(ModOptions.streamBufferCount);
	if (ModOptions.streamBufferSize != 0)
		SoundSystemConfig.setStreamingBufferSize(ModOptions.streamBufferSize * 1024);
	DSurround.log().info("Stream buffers: %d x %d", SoundSystemConfig.getNumberStreamingBuffers(),
			SoundSystemConfig.getStreamingBufferSize());
}
 

import org.lwjgl.openal.ALC11; //导入依赖的package包/类
public OpenALManager(AudioConfig config) {
    logger.info("Initializing OpenAL audio manager");
    config.subscribe(configListener);
    try {
        AL.create();
    } catch (LWJGLException e) {
        throw new RuntimeException(e);
    }

    AL10.alGetError();

    logger.info("OpenAL {} initialized!", AL10.alGetString(AL10.AL_VERSION));

    ALCcontext context = ALC10.alcGetCurrentContext();
    ALCdevice device = ALC10.alcGetContextsDevice(context);

    logger.info("Using OpenAL: {} by {}", AL10.alGetString(AL10.AL_RENDERER), AL10.alGetString(AL10.AL_VENDOR));
    logger.info("Using device: {}", ALC10.alcGetString(device, ALC10.ALC_DEVICE_SPECIFIER));
    logger.info("Available AL extensions: {}", AL10.alGetString(AL10.AL_EXTENSIONS));
    logger.info("Available ALC extensions: {}", ALC10.alcGetString(device, ALC10.ALC_EXTENSIONS));

    IntBuffer buffer = BufferUtils.createIntBuffer(1);
    ALC10.alcGetInteger(device, ALC11.ALC_MONO_SOURCES, buffer);
    logger.info("Max mono sources: {}", buffer.get(0));
    buffer.rewind();

    ALC10.alcGetInteger(device, ALC11.ALC_STEREO_SOURCES, buffer);
    logger.info("Max stereo sources: {}", buffer.get(0));
    buffer.rewind();

    ALC10.alcGetInteger(device, ALC10.ALC_FREQUENCY, buffer);
    logger.info("Mixer frequency: {}", buffer.get(0));
    buffer.rewind();

    AL10.alDistanceModel(AL10.AL_INVERSE_DISTANCE_CLAMPED);

    // Initialize sound pools
    pools.put("sfx", new BasicSoundPool(30)); // effects pool
    pools.put("music", new BasicStreamingSoundPool(2)); // music pool
    pools.get("sfx").setVolume(config.getSoundVolume());
    pools.get("music").setVolume(config.getMusicVolume());
}